Self-adaptive vehicle speed detecting device

• US 20060025958A1
• Filed: 08/02/2004
• Published: 02/02/2006
• Est. Priority Date: 08/02/2004
• Status: Abandoned Application

• Current Assignee: Shih-Hsiung Li
• Original Assignee: Shih-Hsiung Li
• Inventors: Li, Shih-Hsiung
• Application Number:
  US10/910,967
• Publication Number:
  US 20060025958A1
• Time in Patent Office: Days
• US Class Current: 702/142
• CPC Class Codes: B60Q 9/006 using a distance sensor
• CPC Class Codes: G01S 2013/9314 Parking operations
• CPC Class Codes: G01S 2013/9323 Alternative operation using light waves
• CPC Class Codes: G01S 2013/9324 Alternative operation using ultrasonic waves

Abstract

A self-adaptive vehicle speed detecting device has a microprocessor, an input unit and a memory. When setting commands are input to the microprocessor through the input unit, the microprocessor fetches a pulse signal from a vehicle speed sensor as a vehicle speed threshold value. After the threshold value setting, the microprocessor continuously fetches the pulse signal representing a current speed when the vehicle is moving. The pulse signal is compared with the speed threshold value. When the current speed is slower than the threshold value, the microprocessor generates a control signal to driver other devices such as an obstacle detecting sensor.

Claims

1. A self-adaptive vehicle speed detecting device installed in vehicle having a vehicle speed sensor (VSS), the vehicle speed detecting device comprising:

a microprocessor receiving a pulse signal generated from the vehicle speed sensor, wherein the pulse signal represents a current vehicle speed;

an input unit coupled to the microprocessor to receive setting commands input from a user; and

a memory coupled to the microprocessor and storing a speed threshold value;

wherein the self-adaptive vehicle speed detecting device has a setting mode and an operating mode, in the setting mode a pulse signal generated by the VSS representing a desired vehicle speed is fetched as the speed threshold value, and in the operating mode the microprocessor continuously fetches the pulse signal representing a current vehicle speed from the VSS and compares with the speed threshold value, based on the comparison result the microprocessor generates a control command.

2. The self-adaptive vehicle speed detecting device as claimed in claim 1, wherein the microprocessor further connects to an obstacle detecting sensor, and the obstacle detecting sensor is activated when the current vehicle speed is slower than the threshold value.

3. The self-adaptive vehicle speed detecting device as claimed in claim 2, the obstacle detecting sensor is implemented by an ultrasonic sensor, a microwave sensor, an infrared sensor or an image capturing device.

4. The self-adaptive vehicle speed detecting device as claimed in claim 1, the input unit is a button.

5. The self-adaptive vehicle speed detecting device as claimed in claim 1, the input unit is a key set.

6. The self-adaptive vehicle speed detecting device as claimed in claim 1, the memory is implemented by an electrically erasable programmable read-only memory (EEPROM), a flash memory or a non-volatile memory.

7. The self-adaptive vehicle speed detecting device as claimed in claim 1, the microprocessor further connecting to an indicating light showing operation status of the self-adaptive vehicle speed detecting device.

8. The self-adaptive vehicle speed detecting device as claimed in claim 6, the microprocessor further connecting to an indicating light showing operation status of the self-adaptive vehicle speed detecting device.

9. The self-adaptive vehicle speed detecting device as claimed in claim 6, the microprocessor further connecting to an alarm to issue a warning signal.